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The \"Prestige\" to Snowmelt

Jim_64 Member Posts: 253
48.9% PG will give you -25.7 F freeze and 49.9% PG gives you -28.3 F freeze.

Noble Company


  • Derheatmeister
    Derheatmeister Member Posts: 1,514
    The \"Prestige\" to Snowmelt

    On a service call today i saw a prestige that was hooked up directly to the snow melt!

    In this neck of the woods we use about -30 F to protect these systems!

    I do not remember but is this not to much glycol for the Prestige?
  • Dave Stroman
    Dave Stroman Member Posts: 763

    Hi Richard, Sure you can hook them up directly. I see no reason not to.

    Dave Stroman
    Dave Stroman
  • Derheatmeister
    Derheatmeister Member Posts: 1,514

    Thanks Dave. I just remember that Triangle only wanted up to a 50/50 Mix which i think that 49% will give me -20 F ?

    Just seems like this system will be "Living on the edge"
  • hot_rod
    hot_rod Member Posts: 21,793
    just enough to do the job!

    the protection depends not only on the brand of glycol you chose, but also the version.

    This attachment shows a couple examples. The HD fluids, typically for solar use, have a bit different performance numbers.

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • Bart_9
    Bart_9 Member Posts: 2
    Delta T

    Check on their max. 70°F delta T - maybe inject
    from the prestige - just a thought
  • Derheatmeister
    Derheatmeister Member Posts: 1,514
    Delta T

    Have not seen this snow melt in action!
    Have not checked Glycol level or PH yet..I will in the next couple days.
    It is direct piped! will post updates Thanks for all of the help. Richard
  • Rod Kotiga
    Rod Kotiga Member Posts: 68

    Bart is right. I've seen a snowmelted driveway where the hydro-newbie used one pump for the system and the boiler. The Prestige dosen't work like a Knight. The Knight gets a call for snowmelt and it goes right to 100% fire Now! and wont drop from there untill the water temp coming back to it warms up. The Prestige at this job would melt the snow but it would ramp up then down giving a degree more of temp to the slab as the water temps came back warmer . Thus on warmer 25 to 30 days it would melt much quicker. I was wondering why this boiler wasn't staying on high fire and the tech. dept. confirmed it. You can get away with using one pump with these boilers on radiant but snowmelt is a taller mountain. Primary secondary, always.

    Rod K.

  • do you really want to heat a frozen concrete slab at a higher than 70 degree delta T?
This discussion has been closed.